Up until today I have not been exposed to WPF. For all I knew WPF could mean (in this community of acronym abusing Belgium) anything. I tried to determine a context meaning from the post, and my best guess was that it might be HTML because I seen to remember (rightly or wrongly) that @Magus works "front end". So am I supposed to know everything? Am I to assume that every word in a Title is relevant (when the community is not abusing acronyms, it is abusing titles)?

Yes, out of pure ignorance I got it wrong. HENCE the quote. But here is a THING a technique is a techniuqe. Trying to achieve what @Magus wants to achieve in HTML is not trivial and it is certainly not intuitive, well it is if you really understand and the medium your working in. In fact, my first *intuative" solution Got It Wrong™

I have since "researched" WPF, anbd intersetinly:

The grid is a layout panel that arranges its child controls in a tabular structure of rows and columns. Its functionality is similar to the HTML table but more flexible. A cell can contain multiple controls, they can span over multiple cells and even overlap themselves.

The resize behaviour of the controls is defined by the HorizontalAlignment and VerticalAlignment properties who define the anchors. The distance between the anchor and the grid line is specified by the margin of the control

I have Office 365, If I get time I may experiment, but @magus may have a solution by then.

INB4 I know this is "Coding Help", but since when has a Category stopped abuse.
Also INB4, If anybody wants to create or pontificate about a rule and behaviour then they should ensure (at least from that point forward) that they obey such a rule.

I wish. Essentially, WrapPanels are awesome and let you wrap content that overflows in a direction, but you can't fill in the area between controls in them without adding some kind of control to fill the space. Setting alignment works well in most other panel types, but only WrapPanel wraps. I was just hoping someone had come up with something.

Anyway, someone at work built a thing that does it, and there are things on codeproject that appear to do it, but I hate that site. The one we have does things with heavily templated ItemsPanels, somehow. Which scares me.

Haikus are quite fun
though I do them rather wrong
enjoy them, you fools